The largest U.S. seller of San Marzano tomatoes, known to food lovers as the best tomatoes to make pasta sauce, has been hit with two federal lawsuits claiming what's inside the can isn't the real thing.

The largest U.S. seller of San Marzano tomatoes, known to food lovers as the best tomatoes to make pasta sauce, has been hit with two federal lawsuits claiming what's inside the can isn't the real thing.